{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359765206",
    "entityType": "Track",
    "nonce": "0x1b4bd5c8b551e6b7418b7f52971c0b81a354e528f4a3f44976b3c812490a4a9e",
    "signature": "0xc28d59008c8fb12c964c6c508e4bcddc1f27d9bb9380900663d99777e94c3c2d168d0fe2d7b055d0a2aa8d68cf8e495de8480178df40f2061f089e86665a44b11c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}